Funding for this research was provided by:
Hjärt-Lungfonden (20170317, 20160229)
Stiftelsen för Gamla Tjänarinnor (-)
Stiftelsen för ålderssjukdomar vid Karolinska Institutet (-)
Vaccine and Gene Therapy Institute (Start-up funds)
Nova Southeastern University (Startup funds, Start-up funds)
Osteology Foundation (16-033)
Magnus Bergvalls Stiftelse (2017-02416)
Received: 15 August 2019
Revised: 9 October 2019
Accepted: 5 November 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: Fetal hearts were obtained from legal terminations of pregnancy after written consent from the donors and ethical approval (Reg. No.: 2015/1369-31/2) from the Regional Ethics Board in Stockholm.
: Not applicable.
: KHG is a co-founder of the company IsletOne AB. The other authors declare that they have no competing interests.